Dark Water - need help with the ending!

Last night, I was on a plane from Hong Kong to Tokyo and was watching Dark Water. We ran into some terrible turbulence and they shut down the in flight entertainment system for about half an hour. When the movie came back on, I had obviously missed anywhere from 5-15 minutes of the movie!

I stopped watching after the mother had figured out the neighbor girl’s fate and had decided to move out of the apartment complex. The daughter was having a bath - then the movie cuts out. The movie came back on and the father was taking the elevator down with the daughter, daughter gets trapped inside. And the mother was there as a ghost and fixed the daughter’s hair? What happened to the mother?

It wasn’t a great movie - but man, it’s annoying to miss something like that. Any help would be appreciated!

hazy memory but this is the general idea…

Just as Mom & Daughter were ready to move out, Daughter went to the bathroom where Little Girl Ghost appeared & tried to drown Daughter in the tub. Mom comes in & finds the Ghost wants a Mommy so she agrees to die & be Mommy to the Ghost if her daughter is spared, so Daughter escapes as bathroom floods & drowns Mom.

Since the cat is out of the bag, that is what happens. Mom (Jennifer Connelly) shows up in the elevator to fix her daughter’s hair and tell her that she will still be there for her when she needs her. The water coming out of the ceiling of the elevator is the eerie leftover dead person stufff.